Checking kernels: 1. This already uses linux-image-virtual, it is not the even bigger linux-image-generic. 2. The change of the image build sadly combined it all a) new image build/seeding by CPC b) different kernel type -kvm -> -virtual that uses generic c) switch of kernel versions
We did not yet think about 2c here afaics. This is not just -kvm -> -generic. But instead 6.2.0-1003-kvm -> 6.3.0-7-generic 6.3.0-7-kvm does not exist (not built anymore), so to check which of the changes broke this we might need to look at. The closest comparison I'd find is - https://launchpad.net/ubuntu/+source/linux/6.2.0-21.21 - https://launchpad.net/ubuntu/+source/linux-signed/6.2.0-21.21 Installing that on my system The new system with the high memory consumption has: linux-image-6.3.0-7-generic 6.3.0-7.7+1 linux-modules-6.3.0-7-generic 6.3.0-7.7 I'm comparing for: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/bootstrap/+build/25980736/+files/linux-modules-6.2.0-21-generic_6.2.0-21.21_amd64.deb https://launchpad.net/~canonical-signing/+archive/ubuntu/primary-2022v1/+build/25984194/+files/linux-image-6.2.0-21-generic_6.2.0-21.21_amd64.deb root@m-old:~# cat /proc/meminfo MemTotal: 955692 kB MemFree: 630128 kB MemAvailable: 653536 kB So that lets us assume, that the move 6.2->6.3 was not what broke it (actually 6.3 is even a little bit better). The cause really seems to be more the move -kvm -> -generic. I'm sure some change was expected, but so much? Adding Linux bug tasks for them to chime in. ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Confirmed ** Changed in: cloud-images Status: New => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2032933 Title: Mantic (23.10) minimal images increase in memory consumption, port usage and processes running Status in cloud-images: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: The Mantic (Ubuntu 23.10) images are undergoing some big changes prior to 23.10 release in October. This is a devel release so this is the perfect time to be making these changes but we are noticing some changes that were not expected. This bug is to track the unexpected changes and discuss/resolve these. The changes that have been made to mantic minimal: * Move to the linux-generic kernel from the linux-kvm kernel * This also involved removal of the virtio-blk driver, which is the default for QEMU and OpenStack, but this is being restored in an upcoming 6.5 mantic kernel and is being trakced @ https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2030745 * Move to using minimal-cloud seed - see https://ubuntu-archive-team.ubuntu.com/seeds/ubuntu.mantic/cloud-minimal * No longer installing Recommends packages * No initramfs fallback for boot - only initramfsless boot The latest mantic minimal images are available @ http://cloud- images.ubuntu.com/minimal/daily/mantic/ and are also available in the public clouds. A package name manifest diff can be seen @ https://pastebin.ubuntu.com/p/rRd6STnNmK/ We have had reports of higher memory usage on an idle system, higher number of ports open on an idle system and higher number of process running on a idle system. To help with debugging I have built and uploaded the following images and package manifests to https://people.canonical.com/~philroche/20230824-manticl-minimal- LP2032933/ * 20230618-before-kernel-change-before-seed-change-mantic-minimal-cloudimg-amd64 * Before kernel change and before seed change * 20230824-after-kernel-change-before-seed-change-mantic-minimal-cloudimg-amd64 * After kernel change and before seed change * 20230821.1-after-kernel-change-after-seed-change-mantic-minimal-cloudimg-amd64 * After kernel change and after seed change To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/2032933/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
